Allen-Bradley | 1771-IFF | PLC-5 Analog Input Module

Overview  

The Allen-Bradley 1771-IFF is an analog input module designed for the PLC-5 series. It provides flexible input configurations, supporting both differential and single-ended channels, and offers fast update rates with high-resolution data acquisition. Built for industrial automation, the 1771-IFF ensures reliable performance in motor control, process monitoring, and system integration.

Technical Specifications

• Manufacturer: Allen-Bradley (Rockwell Automation)

• Model Number: 1771-IFF

• Type: Analog Input Module

• Product Line: PLC-5 Series

• Weight: 1.19 lbs (0.54 kg)

• Inputs:

• 8 differential selectable channels

• 16 single-ended selectable channels

• Data Format: Natural Binary or BCD scaling to ±9999

• Resolution: 12 bits + sign

• Channel Update Rate:

• 5 ms for 8 channels

• 10 ms for 16 channels

• Voltage Input Ranges:

• 0–5 V DC

• 1–5 V DC

• ±5 V DC

• ±10 V DC

• Current Input Ranges:

• 4–20 mA

• 0–20 mA

• ±20 mA

• Backplane Current Draw: 750 mA

• External Power: Not required

• Wiring Arm: 1771-WG

• Coating: Conformal coat for environmental protection

• Signal Delay:

• AC: 24 ms ±10 ms

• DC: 20 ms ±9 ms

• Mounting: Rack mountable

Key Features

• Flexible input configuration (differential or single-ended)

• Multiple voltage and current ranges supported

• Fast channel update rates for real-time monitoring

• Conformal coating for enhanced durability

• Rack-mount design for easy integration into PLC-5 systems

Applications

• Process automation requiring analog signal acquisition

• Motor drive monitoring and control

• Industrial systems with mixed voltage/current inputs

• Legacy PLC-5 installations needing reliable analog input modules

FAQ

• Q: How many channels does the 1771-IFF support?  A: It supports 8 differential or 16 single-ended channels.

• Q: Is external power required?  A: No, it operates using backplane power only.

• Q: What wiring arm is compatible with this module?  A: The 1771-WG wiring arm.

• Q: What is the resolution of the input signals?  A: 12 bits plus sign.